Two new genera of Paleozoic gastropods

L. A. Nelson

1947

Article

Journal of Paleontology 21(5):460-465

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Taxa discussed in this work:

• Callispira
• Callispira novemcostata
• Callispira quinquecostata
• Paragoniozona
• Paragoniozona multilirata
• Paragoniozona nodolirata